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Carotid Doppler
What is a Carotid Doppler Exam?
A Carotid Doppler exam is an ultrasound examination of the carotid
arteries in your neck. The Doppler ultrasound uses sound waves to
create images and sounds of your blood flow. The test can detect
narrowed or blocked arteries, or blood clots in the veins. A hand-held
probe placed against the skin emits sound waves. The sound waves bounce
off the moving blood and echo back to the probe. The echo is translated
into an image that appears on a screen. This test involves no radiation
and is harmless.
Before Your Test
This test requires little effort to prepare for. You may be asked to
undress from the waist down, keeping your underwear on. Or, you may be
asked to change into a gown. The test takes approximately 45-60 minutes
and is painless. You will be able to drive home afterward.
It is important for you to notify the sonographer if you have had a
stroke or experienced short-term loss of strength, speech, or vision.
During Your Test
You will lie down on an exam table. If the test is done on your neck,
your head will be turned to the side, as if you were looking over your
shoulder. Non-greasy gel will be applied to your neck. The sonographer
will then press a hand-held transducer (probe) against your neck. The
gel may feel wet, don't worry it won't harm your skin or clothes.
You may hear a "whooshing" noise during the test. This is the sound of
your blood flowing. The sonographer can answer questions regarding the
test, but only a doctor can explain the results.
After Your Test
The data obtained from the exam will allow your doctor to see if there
is any plaque in the artery, and to determine the restriction (if any)
of blood flow. Your doctor will notify you with the test results.
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